Argtable is an ANSI C library for parsing GNU style command line options
with a minimum of fuss. It enables a program's command line syntax to be
defined in the source code as an array of argtable structs. The command
line is then parsed according to that specification and the resulting
values are returned in those same structs where they are accessible to
the main program. Both tagged (-v, --verbose, --foo=bar) and untagged
arguments are supported, as are multiple instances of each argument.
